From 1cf5b9cd83d5adcca5e1352ab7c923968ec58f5e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C5=99emysl=20Janouch?=
Date: Sun, 9 Jan 2011 07:09:18 +0100
Subject: [PATCH] Make ld_lua_logdiag_register() a bit safer.
---
src/ld-lua.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/src/ld-lua.c b/src/ld-lua.c
index 7976606..448e25c 100644
--- a/src/ld-lua.c
+++ b/src/ld-lua.c
@@ -406,12 +406,13 @@ ld_lua_logdiag_register (lua_State *L)
lua_pop (L, 1);
g_return_val_if_fail (ud != NULL, 0);
+ /* Use a protected environment, so script errors won't cause leaking
+ * of the symbol object. Only a failure of the last three function calls
+ * before lua_pcall() may cause the symbol to leak.
+ */
+ lua_checkstack (L, 3);
symbol = g_object_new (LD_TYPE_LUA_SYMBOL, NULL);
- /* Use a protected environment, so script errors won't cause leaking
- * of the symbol object. Only the failure of one of the following three
- * function calls may cause the symbol to leak.
- */
lua_pushlightuserdata (L, symbol);
lua_pushcclosure (L, process_registration, 1);
lua_insert (L, 1);